How To Seal A Rusty Metal Roof

Scrape any cracked or peeling paint from the roof before you repaint it or the new paint coating won t adhere properly.

How to seal a rusty metal roof.

Once the rust is scraped away and the area is rinsed cut two pieces of metal repair mesh at least 1 inch larger than the area to be patched. Everbrite will seal moisture out of rusted metal to help prevent further corrosion and will prevent rust stains. Stir thoroughly before applying it with a soft bristled roofing brush or paint roller. Use a zinc based primer on any areas where rust has been scrubbed or sanded away allowing it to dry before applying the protective roof coating or seal.

Instead use a heavy power washer or a light sand blaster to blast away all the loose flaking rust. On most metals two coats of everbrite clear protective coating are recommended. Most of the time not every speck of rust needs to be removed before recoating a rusted metal roof. Rust usually won t eat holes in an aluminum roof but it can discolor the metal.

Apply a thick layer of urethane roofing cement around. If a rusty roof exists a rust primer must be applied prior to the roof coating. If any panel is extensively damaged replace it with a. You can buy rubber based roof coating from most major hardware stores.

If your roof is aluminum you shouldn t. On raw steel or rusted metal 3 to 4 coats are recommended because the metal is very porous. The water or sand will also remove dirt mildew and flaking paint from the surface. Regardless of the coating used the coating protects the sealing materials and extends the life of the metal roof.